Hand printing press



May 13, 1941..

J. F. BOYER HAND PRINTING PRESS Filed May 11, 1940 2 Sheets-Sheet 1fins-N709, JAMA-s l. 5 0 548,

May J F. BQYER H-ANDYPRINTING PRESS Filed May 11, 1940 2 Sheets-Sheet 247'" TO/P/VEVs.

Patented May 13, 1941 UNITED STATES PATENT OFFICE HAND PRINTING PRESSJames Frank Boyer, Kokomo, Ind.

Application May 11, 1940, Serial No. 334,487

4 Claims. (Cl. 101-297) This invention relates to a hand operatedprinting press and has for a primary object the provision of a structurethat may be operated at a relatively low cost and yet b extremelyeffective and simple in operation so that the structure may be suppliedto the trade, particularly the juvenile trade where some experience isto be obtained in the art of printing.

it further primary object of the invention is to provide a structurewhich will receive and -retain printing type, either hand set or inslugs set by the usual Linotype machines and the like.

A further important object of the invention is to provide a structure inwhich the impression from the type may be made through operation of asingle lever for locking up the impression and then increasing thepressure for the desired degree of impression.

A still further important object of the invention is to provide meansfor quickly and easily adjusting the pressure plate in order tov bringit into parallelism with the faces of the printing surfaces.

These and other objects and advantages of the invention will becomeapparent to those versed in the art in the following description of oneparticular form of the invention as illustrated in the accompanyingdrawings, in which Fig. 1 is a side elevation of a structure embodyingthe invention with the pressure plate in the open position;

Fig. 2, a side elevation of the structure with the pressure plateclosed;

Fig. 3, a front elevation of the structure with the pressure plateopened;

Fig. 4, a detail in section on the lin 4-4 in Fig. 3, on an enlargedscale;

Fig. 5, a detail in side elevation of the pressure plate hinge; and

Fig. 6, a detail in partial section of the pressure plate hinge in topplan view.

Like characters of reference indicate like parts throughout the severalviews in the drawings.

, I form a bed plate I preferably arranged to be mounted in a verticalposition, such as on a wall II, by means of screws I2 passing throughears I3 extending from the plate I'll. The bed plate III is arranged tohave a box-like marginal boundary wall I4 within which the type may beplaced and wedged to be retained therewithin. In the present form of theinvention, the containing box It is shown as having blank slugs I5placed therein.

On one side of the bed plate Ill, in the present form being theunderside, extend a pair of arms I6 and II in spaced apart relation.Between the outer ends of these two arms is positioned a foot I8 bymeans of a hinge pin I9, Fig. 6. This pin I9 has a major cylindricalbody portion extending with a sliding fit through a bore in the foot I8and has reduced end portions 20 and 2I carried in bores through therespective arms I6 and. I1, these end portions 20 and 2| being axiallyaligned one with the other to one side of the axis of the major centralportion of the pin so that an eccentric action is provided by revolvingthe pin I9 about its trunnion-like ends 20 and 2I. Turning of the pin I9in this manner is accomplished by any suitable means such as byproviding the end 20 with a slot 22 thereacross to receive a screwdriver screw-threadedly engaging the end 20 with the arm I6.Longitudinal travel of the pin l'9 by reason of these threads is slightsince at most the adjustment of the pin I9 to shift the foot I8 inrelation to the arms I6 and I1 is of a micrometer nature.

This foot I8 is secured by its outer end to the pressure plate 23. Theshape of the arms I6 and I! and the foot I8 is such that the plate 23will come into uniform contact over the entire area of the printingfaces of the slugs I5 when the pressure plate 23 is swung aroundupwardly thereagainst. If there should be any misalignment, it may becorrected to an exact amount. by turning the pin I9 as above indicatedsothat the upper end as well as the lower end of theplate 23 will makthe required contact for uniform impression. This shifting of the plate23 is indicated by the dash lines in Fig. 5.

The impression plate 23 is normally held in a horizontal position asindicated in Figs. 1 and 3. This position is maintained by a lug 24downturned from the foot I8 bearing against a lug 25 on the arm I6.Mounted on the under or outer side of the plate 23 is a cam 26, hereinshown as extending substantially entirely transversely across the plate23, although this length may be shortened or the cam-may be divided intoseparate shorter lengths as may be desired. In any event, the cam 26 isattached to the plate 23 by a pair of bearing plates 21 and 28surrounding reduced, trunnion-like portions of the cam 23 which are freeto revolve under the plates 21 and 28. On an end of the cam member 26 ismounted a latch finger 29, this finger being free to rock about. apivot, herein shown as a screw 30 passing through the latch member andengaging in the end of the cam member 26. In the form here shown, thislatch member 29 is normally urged against a stop post 3I by means of aspring 32. In like manner a latch member 33 is mounted on the oppositeend of. the cam member 26.

Both of these latch members 29 and 33 are mounted to extend normallyabove the pressure plate 23, as indicated in Figs. 1 and 3, when thatplate 23 is in its horizontal position. A lever 34 ing type, plates,slugs, or the like as may be selected are positioned and locked up onthe bed plate 10. Then the paper or member on which the impression fromthat printing surface is to be impressed is placed on the top side ofthe impression plate 23 and there secured in any suitable manner, suchas by the transverse straps or bands 35 and 36. Then the lever 34 isgrasped to rock the plate 23 around upwardly and toward the members I5.Rocking the lever 34 as indicated in Fig. 2 will initially cause thelatch members 29 and 33 to engage over the respective pins 31 and 38 andthen by continued rocking of the lever 34 upwardly and around toward theplate 23, the cam member 25 will force the impression plate 23 with agreat degree of pressure toward the printing members IE to make thedesired impression. It is to be noted that this pressure is created notbetween the bearing members 2'! and 28 but through the latch members 29and 33 and the engaged pins 31 and 38. The plate 23 is released bypulling the lever 34 downwardly to bring the post 3| against its latchmember so as to free that latch member from its respective pins 31 and38 and permit the impression plate 23 to drop down again to its initialnormal horizontal position.

While I have herein shown and described my invention in the oneparticular form, it is obvious that structural changes may be made,particularly in the mounting of the latch members 29 and 33, and thelike, without departing from the spirit of the invention and I,therefore, do not desire to be limited to that precise form beyond thelimitations as may be imposed by the following claims.

I claim:

1. In a hand operated printing press having a type receiving bed plateand a pressure plate rockably attached by one end to the bed plate, ashaft transversely positioned across substantially centrally of androckably mounted on said pressure plate, a pressure plate lifting handlecarried by said shaft, cam means carried by the shaft, a latch barcarried at each end of and rockable about the axis of the shaft, a stopfor each latch bar carried by the shaft at a radial distance from theshaft axis, a spring normally yieldingly urging said bar against saidstop, and latch bar engaging means on said bed plate, said cam meansbeing arranged to push the pressure plate toward the bed plate uponrocking of said handle from a position substantially normal to thepressure plate around toward the plate and said latch bar and its stopbeing located in reference to said cam to have the bar rocked withtravel of the cam into engagement with its said engaging means, saidstop being carried away from the bar upon further cam travel to havesaid spring continue its pressure on the bar tending to maintain saidlatch bar engagement.

2. In a hand operated printing press having a type receiving bed plateand a pressure plate rockably attached by one end to the bed plate, ashaft transversely positioned across substantially centrally of androckably mounted on said latch bar engaging means on said bed plate,said cam means being arranged to push the pressure plate toward the bedplate upon rocln'ng of said handle from a position substantially normalto the pressure plate around toward the plate and said latch bar and itsstop being located in reference to said cam to have the bar rocked withtravel of the cam into engagement with its said engaging means, saidstop being carried away from the bar upon further cam travel to havesaid spring continue its pressure on the bar tending to maintain saidlatch bar engagement, said cam means consisting of a rollereccentrically mounted on said shaft to extend substantially along itsentire length.

3. In a hand operated printing press having a type receiving bed plateand a pressure plate rockably attached by one end to the bed plate, ashaft transversely positioned across substantially centrally of androckably mounted on said pressure plate, a pressure plate lifting handlecarried by said shaft, cam means carried by the shaft, a latch barcarried at each end of and rockably about the axis of the shaft, a stopfor each latch bar carried by the shaft at a radial distance from theshaft axis, a spring normally yieldingly urging said bar against saidstop,

- and latch bar engaging means on said bed plate,

said cam means being arranged to push the pressure plate toward the bedplate upon rocking of said handle from a position substantially normalto the pressure plate around toward the plate and said latch bar and itsstop being located in reference to said cam to have the bar rocked withtravel of the cam into engagement with its said engaging means, saidstop being carried away from the bar upon further cam travel to havesaid spring continue its pressure on the bar tending to maintain saidlatch bar engagement, said cam means consisting of a. rollereccentrically mounted on said shaft to extend substantially along itsentire length, said roller being connected with said handle to be rockedtherewith.

4. In a hand operated printing press having a type receiving bed plateand a pressure plate rockably attached by one end to the bed plate, ashaft transversely positioned across substantially centrally of androckably mounted on said pressure plate, a pressure plate lifting handlecarried by said shaft, cam means carried by the shaft, a latch barcarried at each end of and rockably about the axis of the shaft, a stopfor each latch bar carried by the shaft at a radial distance from theshaft axis, a spring normally yieldingly urging said bar against saidstop, and latch bar engaging means on said bed plate, said cam meansbeing arranged to push the pressure plate toward the bed plate uponrocking of said handle from a position substantially normal tothepressure plate around toward the plate and said latch bar and its stopbeing located in reference to said cam to have the bar rocked withtravel of the cam into engagement with its said engaging means, saidstop being carried away from the bar upon further cam travel to havesaid spring continue its pressure on the bar tending to maintain saidlatch bar engagement, said cam means consisting of a rollereccentrically mounted on said shaft to extend substantially along itsentire length, said latch bar stops being mounted on the outer ends ofsaid roller.

JAMES FRANK BOYER.

